68385388036 has 27 divisors (see below), whose sum is σ = 139220564679. Its totient is φ = 29306454408.

The previous prime is 68385387979. The next prime is 68385388063. The reversal of 68385388036 is 63088358386.

The square root of 68385388036 is 261506.

It is a perfect power (a square), and thus also a powerful number.

It is a super-2 number, since 2×68385388036² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3651745 + ... + 3670423.

Almost surely, 2^68385388036 is an apocalyptic number.

68385388036 is the 261506-th square number.

It is an amenable number.

68385388036 is an abundant number, since it is smaller than the sum of its proper divisors (70835176643).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68385388036 is an frugal number, since it uses more digits than its factorization.

68385388036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37376 (or 18688 counting only the distinct ones).

The product of its (nonzero) digits is 19906560, while the sum is 58.

The spelling of 68385388036 in words is "sixty-eight billion, three hundred eighty-five million, three hundred eighty-eight thousand, thirty-six".